Dr. Emma J. Rosi

Aquatic Ecologist | PhD, University of Georgia

Expertise
freshwater, invasive species, human impacts

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Emma Rosi advanced our understanding of how land use, urbanization, and climate change shape freshwater ecosystems, with projects exploring environmental contaminants such as pharmaceutical and personal care products, aging wastewater infrastructure, environmental implications of agricultural GMOs, and the effects of dams.

Rosi directed the Baltimore Ecosystem Study (BES), a National Science Foundation Long Term Ecological Research site. As part of BES, Rosi explored the role that failing wastewater infrastructure plays in polluting streams and creating antibiotic-resistant microbes. She also revealed how prescription and illicit drugs that enter our waterways impact freshwater quality and aquatic life.

In addition to her work on human-driven threats to freshwaters, Rosi co-led a long-term project, in collaboration with Yale University, investigating how wildebeest and hippos shape the food web in the Kenyan reach of Africa’s Mara River.

Rosi is a leader in the field of freshwater science, is a Fellow of the Society for Freshwater Science and has conducted research on the role of emerging contaminants shaping these systems.  Rosi served on the  US Environmental Protection Agency’s Science Advisory Board and her research has implications for our understanding of anthropogenic stressors on freshwater ecosystems.

You are not always what we think you eat: selective assimilation across multiple whole-stream isotopic tracer studies
Dodds, Walter K., S. M. Collins, Stephen K. Hamilton, J.L. Tank, S.L. Johnson, J.R. Webster, Kevin S. Simon, et al. 2014. “You Are Not Always What We Think You Eat: Selective Assimilation across Multiple Whole-Stream Isotopic Tracer Studies”. Ecology 95 (10): 2757-67. doi:10.1890/13-2276.1.
Wastewater Treatment Effluent Reduces the Abundance and Diversity of Benthic Bacterial Communities in Urban and Suburban Rivers
Drury, Bradley, Emma J. Rosi-Marshall, and John J. Kelly. 2013. “Wastewater Treatment Effluent Reduces the Abundance and Diversity of Benthic Bacterial Communities in Urban and Suburban Rivers”. Applied and Environmental Microbiology 79 (6): 1897-1905. doi:10.1128/AEM.03527-12.
Agricultural land use alters the seasonality and magnitude of stream metabolism
Griffiths, N.A., J.L. Tank, Todd V. Royer, Sarah S. Roley, Emma J. Rosi-Marshall, M.R. Whiles, J. J. Beaulieu, and L. T. Johnson. 2013. “Agricultural Land Use Alters the Seasonality and Magnitude of Stream Metabolism”. Limnology and Oceanography 58 (4): 1513-29. doi:10.4319/lo.2013.58.4.1513.
Anticipating Stream Ecosystem Responses to Climate Change: Toward Predictions that Incorporate Effects Via Land–Water Linkages
Davis, J. M., Colden V. Baxter, Emma J. Rosi-Marshall, J. L. Pierce, and B. T. Crosby. 2013. “Anticipating Stream Ecosystem Responses to Climate Change: Toward Predictions That Incorporate Effects Via Land–Water Linkages”. Ecosystems 16 (5): 909-22. doi:10.1007/s10021-013-9653-4.
Comparing streambed light availability and canopy cover in streams with old-growth versus early-mature riparian forests in western Oregon
Warren, Dana R, William S. Keeton, Heather A. Bechtold, and Emma J. Rosi-Marshall. 2013. “Comparing Streambed Light Availability and Canopy Cover in Streams With Old-Growth Versus Early-Mature Riparian Forests in Western Oregon”. Aquatic Sciences. doi:10.1007/s00027-013-0299-2.
Food-web dynamics in a large river discontinuum
Cross, Wyatt F., Colden V. Baxter, Emma J. Rosi-Marshall, Robert O. Hall, Theodore A. Kennedy, Kevin C. Donner, Holly A. Wellard Kelly, Sarah E. Z. Seegert, Kathrine E. Behn, and Michael D. Yard. 2013. “Food-Web Dynamics in a Large River Discontinuum”. Ecological Monographs 83 (3): 311-37. doi:10.1890/12-1727.1.
High Resolution Measurement of Light in Terrestrial Ecosystems Using Photodegrading Dyes
Roales, Javier, Jorge Durán, Heather A. Bechtold, Peter M. Groffman, and Emma J. Rosi-Marshall. 2013. “High Resolution Measurement of Light in Terrestrial Ecosystems Using Photodegrading Dyes”. PLoS ONE 8 (9): e75715. doi:10.1371/journal.pone.007571510.1371/journal.pone.0075715.g00110.1371/journal.pone.0075715.g00210.1371/journal.pone.0075715.g00310.1371/journal.pone.0075715.g004.
Macroinvertebrate diets reflect tributary inputs and turbidity-driven changes in food availability in the Colorado River downstream of Glen Canyon Dam
Kelly, Holly A. Wellard, Emma J. Rosi-Marshall, Theodore A. Kennedy, Robert O. Hall, Wyatt F. Cross, and Colden V. Baxter. 2013. “Macroinvertebrate Diets Reflect Tributary Inputs and Turbidity-Driven Changes in Food Availability in the Colorado River Downstream of Glen Canyon Dam”. Freshwater Science 32 (2): 397-410. doi:10.1899/12-088.1.
Pharmaceuticals suppress algal growth and microbial respiration and alter bacterial communities in stream biofilms
Rosi-Marshall, Emma J., Dustin W. Kincaid, Heather A. Bechtold, Todd V. Royer, M. Rojas, and John J. Kelly. 2013. “Pharmaceuticals Suppress Algal Growth and Microbial Respiration and Alter Bacterial Communities in Stream Biofilms”. Ecological Applications 23 (3): 583-93. doi:10.1890/12-0491.1.
Solute specific scaling of inorganic nitrogen and phosphorus uptake in streams
Hall, Robert O., M. A. Baker, Emma J. Rosi-Marshall, and J.L. Tank. 2013. “Solute Specific Scaling of Inorganic Nitrogen and Phosphorus Uptake in Streams”. Biogeosciences Discussions 10 (4): 6671-93. doi:10.5194/bgd-10-6671-2013.
Solute-specific scaling of inorganic nitrogen and phosphorus uptake in streams
Hall, Robert O., M. A. Baker, Emma J. Rosi-Marshall, J.L. Tank, and J.D. Newbold. 2013. “Solute-Specific Scaling of Inorganic Nitrogen and Phosphorus Uptake in Streams”. Biogeosciences 10 (11): 7323-31. doi:10.5194/bg-10-7323-2013.
Triclosan Exposure Increases Triclosan Resistance and Influences Taxonomic Composition of Benthic Bacterial Communities
Drury, Bradley, J. Scott, Emma J. Rosi-Marshall, and John J. Kelly. 2013. “Triclosan Exposure Increases Triclosan Resistance and Influences Taxonomic Composition of Benthic Bacterial Communities”. Environmental Science & Technology, 130725155410004. doi:10.1021/es401919k.
Air-water oxygen exchange in a large whitewater river
Hall, Robert O., Theodore A. Kennedy, and Emma J. Rosi-Marshall. 2012. “Air-Water Oxygen Exchange in a Large Whitewater River”. Limnology & Oceanography: Fluids & Environments 2: 1-11. doi:10.1215/21573689-1572535.
The Nitrogen Cycle
Groffman, Peter M., and Emma J. Rosi-Marshall. 2012. “The Nitrogen Cycle”. In K. C. Weathers, D. L. Strayer and G. E. Likens (eds.). Fundamentals of Ecosystem Science, 137-58. Academic Press, Inc.
The antihistamine cimetidine alters stream invertebrate growth and production in artificial streams
Hoppe, P., Emma J. Rosi-Marshall, and Heather A. Bechtold. 2012. “The Antihistamine Cimetidine Alters Stream Invertebrate Growth and Production in Artificial Streams”. J. N. Am. Benthol. Soc. 31 (2): 379-88. doi:10.1899/11-089.
Effects of benthic habitat restoration on nutrient uptake and ecosystem metabolism in three headwater streams
Hoellein, T.J., J.L. Tank, S.A. Entrekin, Emma J. Rosi-Marshall, M.L. Stephen, and G.A. Lamberti. 2012. “Effects of Benthic Habitat Restoration on Nutrient Uptake and Ecosystem Metabolism in Three Headwater Streams”. River Res. Appl 28 (9): 1451-61. doi:10.1002/rra.1547.
Pharmaceutical Compounds and Ecosystem Function: An Emerging Research Challenge for Aquatic Ecologists
Rosi-Marshall, Emma J., and Todd V. Royer. 2012. “Pharmaceutical Compounds and Ecosystem Function: An Emerging Research Challenge for Aquatic Ecologists”. Ecosystems 15: 867-80. doi:10.1007/s10021-012-9553-z.
A practical method for measuring integrated solar radiation reaching streambeds using photodegrading dyes
Bechtold, Heather A., Emma J. Rosi-Marshall, Dana R Warren, and Jonathan J. Cole. 2012. “A Practical Method for Measuring Integrated Solar Radiation Reaching Streambeds Using Photodegrading Dyes”. Freshwater Science. The Society for Freshwater Science, 1070-77. http://www.jnabs.org/doi/abs/10.1899/12-003.1.
Temporal variation in organic carbon spiraling in Midwestern agricultural streams
Griffiths, N.A., J.L. Tank, Todd V. Royer, T. J. Warrner, T.C. Frauendorf, Emma J. Rosi-Marshall, and M.R. Whiles. 2012. “Temporal Variation in Organic Carbon Spiraling in Midwestern Agricultural Streams”. Biogeochemistry 108: 149-69. doi:10.1007/s10533-011-9585-z.
Ecosystem ecology meets adaptive management: food web response to a controlled flood on the Colorado River, Glen Canyon
Cross, Wyatt F., Colden V. Baxter, Kevin C. Donner, Emma J. Rosi-Marshall, Theodore A. Kennedy, Robert O. Hall, Holly A. Wellard Kelly, and R.S. Rogers. 2011. “Ecosystem Ecology Meets Adaptive Management: Food Web Response to a Controlled Flood on the Colorado River, Glen Canyon”. Ecol. Appl. 21: 2016-33.